EP2695159B1 - Aktive buffeting-kontrolle bei einem fahrzeug - Google Patents

Aktive buffeting-kontrolle bei einem fahrzeug Download PDF

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Publication number
EP2695159B1
EP2695159B1 EP12719120.3A EP12719120A EP2695159B1 EP 2695159 B1 EP2695159 B1 EP 2695159B1 EP 12719120 A EP12719120 A EP 12719120A EP 2695159 B1 EP2695159 B1 EP 2695159B1
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EP
European Patent Office
Prior art keywords
noise control
control arrangement
buffeting
active
cabin
Prior art date
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Revoked
Application number
EP12719120.3A
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English (en)
French (fr)
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EP2695159A2 (de
Inventor
Gregory D. RIZZO
Todd Deaville
Thomas Pilette
Anthony J. Povinelli
Mats Gustavsson
Urban Emborg
Fredrik Samuelsson
Gustav KRISTIANSSON
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Magna International Inc
Original Assignee
Magna International Inc
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Application filed by Magna International Inc filed Critical Magna International Inc
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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1785—Methods, e.g. algorithms; Devices
    • G10K11/17857—Geometric disposition, e.g. placement of microphones
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
    • G10K11/17813—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the acoustic paths, e.g. estimating, calibrating or testing of transfer functions or cross-terms
    • G10K11/17817—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the acoustic paths, e.g. estimating, calibrating or testing of transfer functions or cross-terms between the output signals and the error signals, i.e. secondary path
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1785—Methods, e.g. algorithms; Devices
    • G10K11/17853—Methods, e.g. algorithms; Devices of the filter
    • G10K11/17854—Methods, e.g. algorithms; Devices of the filter the filter being an adaptive filter
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1787—General system configurations
    • G10K11/17875—General system configurations using an error signal without a reference signal, e.g. pure feedback
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/002—Damping circuit arrangements for transducers, e.g. motional feedback circuits
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/128—Vehicles
    • G10K2210/1282—Automobiles
    • G10K2210/12821—Rolling noise; Wind and body noise
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/129—Vibration, e.g. instead of, or in addition to, acoustic noise
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30—Means
    • G10K2210/321—Physical
    • G10K2210/3229—Transducers
    • G10K2210/32291—Plates or thin films, e.g. PVDF
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/13—Acoustic transducers and sound field adaptation in vehicles

Definitions

  • the present invention relates to an active buffeting noise control arrangement for a vehicle.
  • DE 197 42 741 A1 discloses a noise suppression device for a motor vehicle comprising a microphone being connected directly to an amplifier linked to a stop position switch identifying the open/close status of a sun roof.
  • a loud speaker connected to the vehicle's boot space is coupled in antiphase to the amplifier's output signal.
  • US 2010/0290639 A1 discloses an acoustical window assembly for a vehicle including a transparent glass window panel and mounting portions for mounting respective perimeter regions of the window panel to a vehicle structure.
  • An actuating assembly is operable to vibrate the window panel via vibration of a substantially rigid interface element relative to the vehicle structure.
  • the present invention is directed to an active buffeting noise control arrangement for a vehicle having one or more window panels of a vehicle cabin.
  • One or more actuators are positioned at or near the one or more window panels and are operable to selectively vibrate the one or more windows in order to generate sound waves that will counteract a low frequency throb or buffeting event.
  • the arrangement further includes one or more sensors in a vehicle cabin for detecting the buffeting event and transmitting sensor data to a control module.
  • the control module is connected to the one or more sensors as well as the one or more actuators where the control module receives the sensory data, determines if a buffeting event is occurring and commands the one or more actuator assemblies to vibrate the window and generate sound waves that are operable to counteract the buffeting event.
  • the vehicle 12 has one or more window panels which include, but are not limited to the rear window panel 14, one or more side window panels 16 and front window panel or front windshield 18 that form part of the boundaries of the vehicle cabin 20.
  • the one or more actuators 22, 22' are operable to selectively vibrate the one or more window panels 14, 16, 18 using sound waves.
  • the one or more actuators 22 are connected to the rear window panel 14 and can cause sound waves in a range of less than thirty hertz to be distributed throughout the vehicle cabin 20.
  • the present invention is used in connection with an invention described in US Patent Application Publication No. US2008/0232609A1, published September 25, 2008 , entitled "ACOUSTICAL WINDOW ASSEMBLY FOR VEHICLE".
  • the scope of the present invention is not limited to actuators described in the above published application.
  • the actuators 22, 22' be any type of sound wave generator capable of generating sound waves below thirty Hertz. Suitable sound wave generators include but are not limited to automobile speakers, piezoelectric sound generators or piezoelectric speakers and air pressure generators.
  • One or more sensors 24 are positioned within the vehicle cabin 20 and transmit sensor data including the detection of a buffeting event.
  • the buffeting event can be caused by the opening of one or more of the side window panels 16 or other windows such as sun roofs, when the vehicle 12 is in motion.
  • a buffeting event is defined as a low frequency sound wave or low frequency throb sound in the cabin.
  • buffeting event is caused by a change in cabin pressure caused by the opening of a window which causes a noticeable low frequency throb in the cabin.
  • Other types of buffeting events include low frequency sound generated from engine idling or wind noise when the car is moving and the windows are closed as well as other buffeting events generated from sources in the outside environment.
  • the low frequency throb is sound pressure in a frequency below about thirty hertz and preferably between about eight and about twenty Hertz.
  • the one or more sensors 24 are any type of sensor that is capable of detecting sound or pressure changes within the vehicle cabin 20.
  • the one or more sensors 24 are pressure transducers or microphones capable of detecting sound waves within the vehicle cabin 20.
  • the one or more sensors are a combination of different types of sensors positioned within the cabin.
  • the placement of the one or more sensors 24 in the cabin varies depending upon the type of sensor being used. However, it is desirable to position the sensors 24 at a location that will allow for quick and early detection of the buffeting event in the vehicle cabin 20. In some applications, it is desirable to position the sensors at a location near the ears of a person seated in the vehicle cabin 20. For example, the sensors are positioned in the head rest of the vehicle seats.
  • the transmitted sensor data or input signals from the one or more sensors 24 is received by a control module 26 that determines if a buffeting event is occurring.
  • the control module 26 is also connected to and sends command signals to the one or more actuators 22 that will in turn cause the one or more actuators 22 to vibrate the one or more window panels 14, 16, 18 that the one or more actuators 22 are operably connected with and generate cancelling sound waves that are operable to counteract or cancel the buffeting sound event within the vehicle cabin 20.
  • the control module 26 is programmed with one or more algorithms for determining the appropriate command signal and appropriate sound wave frequency to be generated by the one or more actuator assemblies based on input signals from the one or more sensors 24.
  • the above algorithm is used to estimate the primary noise detected by sensors 24 and use it as a reference signal x(n) for the active noise control (ANC) filter.
  • the above algorithm is an adaptive feedback ANC system using filtered-x LMS (FXLMS) algorithm where the reference signal x(n) is synthesized as an estimate of the primary noise d(n).
  • FXLMS filtered-x LMS
  • the above algorithm is used by the control module 26 in order to calculate the appropriate frequency generated using the acutators 22, 22'.
  • multiple channels to be used with the control module 26 as well as multiple actuators 22 which may generate various frequencies in order to provide better counteract of the buffeting event.
  • Factors used in calculating the control algorithm include, but are not limited to, the distance from sensor to the buffeting event source, such as a window, and the number of actuators being used. Additionally, the number of channels or the number of counteracting noise sound waves being generated by the actuators 22, 22' can also affect the calculations made using the control algorithm. Additionally, the distance or placement of the multiple actuators 22, 22' relative to the one or more window panels 14, 16, 18 can also have an effect on the calculations made by the control algorithm.
  • Figs. 2a-2d are graphs showing the effect achieved using the active noise control arrangement in an idling vehicle in accordance with one embodiment of the present invention.
  • Each graph, Figs. 2a-2d shows the decibels versus the hertz for one of four microphones placed at various locations within the vehicle cabin 20. The test measured sound levels in an idling vehicle with the windows closed.
  • line 100 shows a graph of the decibel versus the hertz at a given microphone prior to activation of the active noise control arrangement in accordance with the present invention
  • line 102 shows the decibels versus hertz values when the active noise control arrangement is generating cancelling sound waves in accordance with the present invention.
  • Fig. 3 is a graph that shows the effect achieved using the active noise control arrangement in accordance with the present invention for a buffeting event caused by an open window in the vehicle cabin.
  • the graph shows the decibel versus hertz for one microphone placed within the vehicle cabin.
  • line 300 shows the sound levels measured in the vehicle cabin prior to activation of the active noise control.
  • Line 302 shows the measured sound levels in the vehicle cabin when the active noise control arrangement is activated.
  • Line 304 shows the measured sound levels when the active noise control is on.
  • the results demonstrated in the graph shown in Fig. 3 show that the use of the active noise control arrangement in accordance with the present invention significantly reduces the buffeting event in a range below thirty hertz and preferably between eight and twenty Hertz.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Window Of Vehicle (AREA)

Claims (13)

  1. Aktive Flattergeräusch-Steuerungsanordnung (10) für ein Fahrzeug (20), umfassend:
    eine oder mehrere Fensterpanels (14, 16, 18) eines Fahrzeug-Fahrgastraums (20);
    einen oder mehrere Sensoren (24) in dem Fahrzeug-Fahrgastraum (20) zum Detektieren eines Flatterereignisses und Übertragen von Sensordaten; wobei die aktive Flattergeräusch-Steuerungsanordnung (10) durch Folgendes gekennzeichnet ist:
    ein oder mehrere Betätigungsglieder (22, 22'), die an oder nahe dem einen oder den mehreren Fensterpanels (14, 16, 18) positioniert sind, wobei das eine oder die mehreren Betätigungsglieder (22, 22') funktionsfähig sind, das eine oder die mehreren Fensterpanels (14, 16, 18) selektiv zu vibrieren, und
    ein Steuermodul (26), das mit dem einen oder den mehreren Sensoren (24) und dem einen oder den mehreren Betätigungsgliedern (22, 22') verbunden ist, wobei das Steuermodul (26) die Sensordaten empfängt, bestimmt, ob ein Flatterereignis erfolgt, und das eine oder die mehreren Betätigungsglieder (22, 22') anweist, das eine oder die mehreren Fensterpanels (14, 16, 18) zu vibrieren und Aufhebungs-Schallwellen zu erzeugen, die funktionsfähig sind, dem Flatterereignis entgegenzuwirken.
  2. Aktive Flattergeräusch-Steuerungsanordnung (10) nach Anspruch 1, wobei das eine oder die mehreren Fensterpanels (14, 16, 18) angepasst sind, zu vibrieren, wodurch bewirkt wird, dass die Aufhebungs-Schallwellen in einem Bereich von weniger als dreißig Hertz sind, wobei die Aufhebungs-Schallwellen durch den Fahrzeug-Fahrgastraum verteilt werden.
  3. Aktive Flattergeräusch-Steuerungsanordnung (10) nach Anspruch 1, wobei das eine oder die mehreren Fensterpanels (14, 16, 18) angepasst sind, zu vibrieren, wodurch bewirkt wird, dass die Aufhebungs-Schallwellen in einem Bereich von acht bis zwanzig Hertz sind, wobei die Aufhebungs-Schallwellen durch den Fahrzeug-Fahrgastraum verteilt werden.
  4. Aktive Flattergeräusch-Steuerungsanordnung (10) nach Anspruch 1, wobei das Steuermodul ferner einen durch: x n ≡ d ^ n = e n ∑ m = 0 M − 1 S ^ M y n − m
    Figure imgb0003
     repräsentierten Algorithmus zum Berechnen der Aufhebungs-Schallwellen, die von der einen oder den mehreren Betätigungsglied-Baugruppen und dem einen oder den mehreren Fensterpanels (14, 16, 18) erzeugt werden, enthält.
  5. Aktive Flattergeräusch-Steuerungsanordnung (10) nach Anspruch 1, wobei die Sensordaten von dem Steuermodul (26) als ein Referenzsignal zum Berechnen eines Befehlssignals, das für das eine oder die mehreren Betätigungsglieder (22, 22') zu erzeugen ist, verwendet wird,
    wobei das Befehlssignal von dem einen oder den mehreren Betätigungsgliedern (22, 22') zum Vibrieren des einen oder der mehreren Fensterpanels (14, 16, 18) bei einer Frequenz, die von dem Befehlssignal bestimmt wird, verwendet wird.
  6. Aktive Flattergeräusch-Steuerungsanordnung (10) nach Anspruch 1, wobei der eine oder die mehreren Sensoren (24) einer sind, ausgewählt aus der Gruppe, umfassend Druckwandler oder Mikrofone, die imstande sind, Schallwellen in dem Fahrzeug-Fahrgastraum (20) zu detektieren.
  7. Aktive Flattergeräusch-Steuerungsanordnung (10) nach Anspruch 1, wobei der eine oder die mehreren Sensoren (24) in einer Kopfstütze eines Sitzes in dem Fahrzeug-Fahrgastraum (20) positioniert sind.
  8. Aktive Flattergeräusch-Steuerungsanordnung (10) nach Anspruch 1, wobei das Flatterereignis als eine niederfrequente Schallwelle oder ein niederfrequentes Pulsiergeräusch in dem Fahrgastraum (20) definiert ist.
  9. Aktive Flattergeräusch-Steuerungsanordnung (10) nach Anspruch 8, wobei die niederfrequente Schallwelle oder das niederfrequente Pulsiergeräusch in dem Fahrgastraum (20) durch das Öffnen einer oder mehrerer Seitenfensterpanels des Fahrgastraums oder eines Schiebedachs verursacht wird.
  10. Aktive Flattergeräusch-Steuerungsanordnung (10) nach Anspruch 8, wobei die niederfrequente Schallwelle oder das niederfrequente Pulsiergeräusch in dem Fahrgastraum (20) durch Motorleerlauf oder Windgeräusch, wenn das Fahrzeug in Bewegung ist und das eine oder die mehreren Fensterpanels (14, 16, 18) des Fahrzeug-Fahrgastraums geschlossen sind, erzeugt wird.
  11. Aktive Flattergeräusch-Steuerungsanordnung (10) nach Anspruch 8, wobei die niederfrequente Schallwelle oder das niederfrequente Pulsiergeräusch in dem Fahrgastraum (20) Schalldruck bei einer Frequenz unter etwa 30 Hz ist.
  12. Aktive Flattergeräusch-Steuerungsanordnung (10) nach Anspruch 11, wobei die niederfrequente Schallwelle oder das niederfrequente Pulsiergeräusch in dem Fahrgastraum (20) in einem Bereich zwischen etwa 8 Hz und etwa 20 Hz ist.
  13. Aktive Flattergeräusch-Steuerungsanordnung (10) nach einem der vorstehenden Ansprüche, wobei das eine oder die mehreren Fensterpanels ein Windschutzscheibenpanel (18) und ein oder mehrere Seitenfenster (16) des Fahrzeug-Fahrgastraums (20) umfassen, wobei das eine oder die mehreren Betätigungsglieder (22) an oder nahe der Windschutzscheibe (18) positioniert sind und wobei das Flatterereignis vorkommt, wenn das eine oder die mehreren Seitenfensterpanels (16) geöffnet sind; und wobei das Steuermodul (26) angepasst ist, das eine oder die mehreren Betätigungsglieder (22) anzuweisen, die Windschutzscheibe (18) zu vibrieren.
EP12719120.3A 2011-04-01 2012-03-30 Aktive buffeting-kontrolle bei einem fahrzeug Revoked EP2695159B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161516329P 2011-04-01 2011-04-01
PCT/US2012/031497 WO2012135642A2 (en) 2011-04-01 2012-03-30 Active buffeting control in an automobile

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EP2695159A2 EP2695159A2 (de) 2014-02-12
EP2695159B1 true EP2695159B1 (de) 2016-12-21

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US (1) US20150358727A1 (de)
EP (1) EP2695159B1 (de)
JP (1) JP2014514607A (de)
CA (1) CA2827775A1 (de)
WO (1) WO2012135642A2 (de)

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US10487562B2 (en) 2017-10-16 2019-11-26 Ford Global Technologies, Llc Systems and methods for mitigating open vehicle window throb
US11195506B2 (en) 2018-12-03 2021-12-07 Toyota Motor Engineering & Manufacturing North America, Inc. Sound-modulating windows
FR3096825A1 (fr) * 2019-05-29 2020-12-04 Psa Automobiles Sa Dispositif antibruit actif pour atténuer le bruit de battement de volume dans un habitacle de véhicule
FR3102743B1 (fr) * 2019-11-05 2023-08-25 Saint Gobain Système audio pour véhicule
US11170751B1 (en) 2020-09-21 2021-11-09 Toyota Motor Engineering & Manufacturing North America, Inc. Active noise control for vehicle with a single open window

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EP0964387A2 (de) 1998-06-13 1999-12-15 DaimlerChrysler AG Verfahren und Vorrichtung zur Beeinflussung von, von Fensterscheiben stammenden Geräuschen

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WO2012135642A3 (en) 2012-12-27
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WO2012135642A2 (en) 2012-10-04
JP2014514607A (ja) 2014-06-19
CA2827775A1 (en) 2012-10-04

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